List of the Paleozoic life of Minnesota

This list of the Paleozoic life of Minnesota contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Minnesota and are between 538.8 and 252.17 million years of age.

A

• †Abludoglyptocrinus –
  • †Abludoglyptocrinus charltoni
• †Acanthocrania
  • †Acanthocrania granulosa
  • †Acanthocrania setigeria
• †Acanthoparypha
  • †Acanthoparypha evetti
• †Actinoceras
  • †Actinoceras beloitense
  • †Actinoceras bigsbyi
  • †Actinoceras gravicentrum
  • †Actinoceras janesvillensis
• †Actinodiscus
• †Aechmina
  • †Aechmina cuspidata
  • †Aechmina ionensis
• †Agelacrinites
• †Alaskadiscus
  • †Alaskadiscus subacutus
• †Allodesma – type locality for genus
  • †Allodesma subellipticum – type locality for species
• †Allumettoceras
  • †Allumettoceras carletonense – or unidentified comparable form
  • †Allumettoceras planodorsatum
• †Ambonychia
  • †Ambonychia tenuis
• †Ambonychiopsis
• †Amecystis
  • †Amecystis woodi
• †Americoncha
  • †Americoncha marginata
• †Amorphognathus
  • †Amorphognathus superbus
• †Amphilichas
  • †Amphilichas cucullus – or unidentified comparable form
• †Amygdalocystites
• †Anaspyroceras
  • †Anaspyroceras anellus
  • †Anaspyroceras calvini
  • †Anaspyroceras clermontense
  • †Anaspyroceras perroti
• †Anazyga
  • †Anazyga recurvirostra
• †Anolotichia
  • †Anolotichia impolita
• †Antiplectoceras – tentative report
• †Anulocrinus
  • †Anulocrinus forrestonensis
• †Aparchites
  • †Aparchites barbatus
  • †Aparchites carinatus
  • †Aparchites chatfieldensis
  • †Aparchites ellipticus
  • †Aparchites fimbriatus
  • †Aparchites macrus
  • †Aparchites paratumida
• †Apycnodiscus
• †Archaeocrinus
  • †Archaeocrinus obconicus
• †Archinacella
  • †Archinacella cingulata
  • †Archinacella deleta
  • †Archinacella simplex
  • †Archinacella simulatrix
  • †Archinacella valida
• †Aristerella
• †Armenoceras
  • †Armenoceras clermontense
  • †Armenoceras iowense
• †Arthroclema
  • †Arthroclema armatum
• †Arthropora
  • †Arthropora simplex
• †Arthrostylus
  • †Arthrostylus conjunctus
  • †Arthrostylus obliquus
• †Aspidopora
• †Astreptodictya
  • †Astreptodictya acuta
  • †Astreptodictya elegans
  • †Astreptodictya fimbriata
  • †Astreptodictya pumila
• †Astrocystites
• †Ateleocystites
  • †Ateleocystites guttenbergensis
• †Athrophragma
  • †Athrophragma foliata
• †Austinella
  • †Austinella kankakensis –

B

• †Bairdiocypris –
  • †Bairdiocypris granti
• †Basilicus
  • †Basilicus barrandi
• †Bassleratia
  • †Bassleratia typa
• †Bathyurus
  • †Bathyurus longispinus
• †Batostoma
  • †Batostoma fertile
  • †Batostoma magnopora
  • †Batostoma winchelli
• †Bellimurina
  • †Bellimurina charlottae
• †Bellornatia
  • †Bellornatia tricollis
• †Belodina
  • †Belodina compressa
  • †Belodina confluens
• †Beloitoceras
  • †Beloitoceras carveri
  • †Beloitoceras grafense
  • †Beloitoceras houghtoni
  • †Beloitoceras huronense – or unidentified comparable form
  • †Beloitoceras janesvillense
  • †Beloitoceras lycum
  • †Beloitoceras norwoodi
  • †Beloitoceras pandion
  • †Beloitoceras plebeium
  • †Beloitoceras whitneyi
• †Berkeia – type locality for genus
  • †Berkeia typica – type locality for species
• †Beyrichia
  • †Beyrichia irregularis
• †Bodeiceras
  • †Bodeiceras oxygonium
• †Bollia
  • †Bollia regularis
  • †Bollia ruthae
  • †Bollia subaequata
  • †Bollia subaequeata

• 

  Reconstructive diagram (left) of a fossil (right) of the Ordovician sea urchin Bothriocidaris. The short spines which were attached to the tubercles are not drawn.

  †Bothriocidaris
  • †Bothriocidaris solemi
• †Brachytomaria
  • †Brachytomaria semele
• †Bromidella
  • †Bromidella depressa
  • †Bromidella rhomboides
• †Bryantodina
  • †Bryantodina abrupta
  • †Bryantodina typicalis
• †Bucania
  • †Bucania elliptica
  • †Bucania halli
  • †Bucania minnesotensis
  • †Bucania sublata
• †Bullatella
  • †Bullatella granilabiatus
  • †Bullatella granlabiatus
• †Bumastoides
  • †Bumastoides milleri
  • †Bumastoides porrectus

• 

  Life restoration of the Early Ordovician-Silurian trilobite Bumastus

  †Bumastus
  • †Bumastus orbicaudatus
• †Byrsolopsina
  • †Byrsolopsina centipunctata
  • †Byrsolopsina normella
  • †Byrsolopsina ovata
  • †Byrsolopsina planilateralis
• Bythocypris
  • †Bythocypris curta
  • †Bythocypris furnishi
• †Bythopora
  • †Bythopora subgracilis –

C

• †Calceocrinus
  • †Calceocrinus gossmani
  • †Calceocrinus levorsoni

• 

  Fossil of the Early Ordovician-Early Devonian trilobite Calymene

  †Calymene
  • †Calymene mamillate
  • †Calymene winchelli
• †Camaraspis
  • †Camaraspis convexus
• †Camaraspoides
  • †Camaraspoides berkeyi
• †Camellaspongia – type locality for genus
  • †Camellaspongia tumula – type locality for species

• 

  Restoration of the Middle Ordovician-Silurian nautiloid cephalopod Cameroceras feeding on an Aphetoceras, while a quartet of Cyclostomiceras swim by

  †Cameroceras
  • †Cameroceras alternatum – or unidentified comparable form
  • †Cameroceras hennepini
  • †Cameroceras inopinatum – type locality for species
  • †Cameroceras stillwaterense – type locality for species
• †Campylorthis
  • †Campylorthis deflecta
• †Carabocrinus
  • †Carabocrinus dicyclicus
  • †Carabocrinus magnificus
  • †Carabocrinus oogyi
  • †Carabocrinus radiatus
  • †Carabocrinus slocomi
• †Carinaropsis
  • †Carinaropsis cymbula
  • †Carinaropsis minima
• †Cataschisma
  • †Cataschisma convexum
• †Centrocyrtoceras
  • †Centrocyrtoceras annulatum
  • †Centrocyrtoceras duplicostatum
  • †Centrocyrtoceras rotundum
• †Ceratopea
  • †Ceratopea canadensis
  • †Ceratopea parvum – type locality for species
  • †Ceratopea pygmaea – type locality for species
• †Ceratopsis
  • †Ceratopsis chambersi
  • †Ceratopsis humilinoda
  • †Ceratopsis quadrifida
• †Ceraurinella
  • †Ceraurinella scofieldi
  • †Ceraurinella templetoni
• †Ceraurinus
  • †Ceraurinus icarus

• 

  Fossil of the Middle-Late Ordovician trilobite Ceraurus

  †Ceraurus
  • †Ceraurus pleurexanthemus
  • †Ceraurus pleurexanthomus
• †Charactoceras
  • †Charactoceras laddi
• †Chariocephalus
  • †Chariocephalus whitfieldi
• †Chasmatopora
  • †Chasmatopora reticulata
• †Cheilocephalus
  • †Cheilocephalus stcroixensis
• †Cheirocrinus
• †Chidleyenoceras
• †Chirognathus
  • †Chirognathus duodactylus
• †Cincinnaticrinus
  • †Cincinnaticrinus varibrachialus

• 

  Assemblage of fossilized shells of the Ordovician brachiopod Cincinnetina

  †Cincinnetina
  • †Cincinnetina minnesotensis – type locality for species
• †Clathrospira
  • †Clathrospira conica
  • †Clathrospira subconica
• †Cleiocrinus
• †Cleionychia
• †Coelocerodontus
  • †Coelocerodontus trigonius
• †Colpodon
• †Colpomya

• 

  Fossil of the Ordovician bryozoan Constellaria

  †Constellaria
  • †Constellaria varia
• †Conularia
• †Cordylodus
  • †Cordylodus delicatus
• †Cornites
• †Coronocystis
  • †Coronocystis durandensis
• †Cotteroceras
  • †Cotteroceras compressum
• †Cotylahindia – type locality for genus
  • †Cotylahindia panaca – type locality for species
• †Crania
  • †Crania reversa
• †Craniops
  • †Craniops minor
• †Cremacrinus
  • †Cremacrinus arctus
  • †Cremacrinus crossmani
  • †Cremacrinus gerki
  • †Cremacrinus guttenbergensis
  • †Cremacrinus punctatus
• †Cryptophyllus
  • †Cryptophyllus obloides
  • †Cryptophyllus oboloides
  • †Cryptophyllus sulcatus
• †Crytoniodus
  • †Crytoniodus complicatus
• †Ctenobolbina
  • †Ctenobolbina emaciata
  • †Ctenobolbina maquoketensis
• †Ctenodonta
  • †Ctenodonta novicea
  • †Ctenodonta oviformis – type locality for species
  • †Ctenodonta similis
  • †Ctenodonta subnasuta – type locality for species
• †Culumbodina
  • †Culumbodina penna
• †Cuneamya
• †Cupulocrinus
  • †Cupulocrinus canaliculatus
  • †Cupulocrinus conjugans
  • †Cupulocrinus graciis – or unidentified related form
  • †Cupulocrinus gracilis
  • †Cupulocrinus humilis
  • †Cupulocrinus jewetti
  • †Cupulocrinus latibrachiatus – or unidentified related form
  • †Cupulocrinus levorsoni
  • †Cupulocrinus molanderi
  • †Cupulocrinus plattevillensis
• †Curtognathus
• †Cyclocystoides
  • †Cyclocystoides halli
• †Cyclonema
  • †Cyclonema aiens
  • †Cyclonema percarinata
  • †Cyclonema textilis
  • †Cyclonema varicosum
• †Cyclospira
  • †Cyclospira bisulcata
• †Cymatonota
• †Cyptendoceras
  • †Cyptendoceras ruedemanni
• †Cyrtocerina
  • †Cyrtocerina crenulata
  • †Cyrtocerina schoolcrafti
• †Cyrtodonta
  • †Cyrtodonta descriptus
  • †Cyrtodonta dignus
  • †Cyrtodonta grandis
• †Cyrtodontula
  • †Cyrtodontula praecipita – type locality for species
• †Cyrtoizoceras
  • †Cyrtoizoceras minneapolis
• †Cyrtolites
  • †Cyrtolites dilatus
  • †Cyrtolites disjunctus
  • †Cyrtolites minor
  • †Cyrtolites ornatus
  • †Cyrtolites retrorsus
• †Cyrtonellopsis
  • †Cyrtonellopsis vetulum
• †Cyrtospira
  • †Cyrtospira wykoffensis
• †Cyrtostropha
  • †Cyrtostropha salteri –

D

• †Daidia
  • †Daidia subconica – type locality for species
• †Dalmanella
  • †Dalmanella rara – or unidentified comparable form
  • †Dalmanella sculpta – tentative report
• †Dapsilodus
  • †Dapsilodus mutatus
• †Deceptrix
• †Deckeroceras
  • †Deckeroceras clermontense
• †Deiroceras
  • †Deiroceras scofieldi
• †Dekayella
  • †Dekayella praenuntia
• †Delotaxis
• †Dendrocrinus
  • †Dendrocrinus acutidactylus – or unidentified related form
  • †Dendrocrinus casei
• †Desmograptus
  • †Desmograptus cancellatus
• †Diceromyonia
  • †Diceromyonia ignota
• †Dicranella
  • †Dicranella bicornis
  • †Dicranella marginata
  • †Dicranella marinata
  • †Dicranella simplex
  • †Dicranella spinosa
  • †Dicranella typa
• †Diestoceras
  • †Diestoceras alceum
  • †Diestoceras clarkei
• †Dilobella
  • †Dilobella simplex
  • †Dilobella typa
• †Dinorthis
  • †Dinorthis pectinella
• †Diorthelasma
  • †Diorthelasma weissi – type locality for species

• 

  Cambrian graptolite Diplograptus

  †Diplograptus
  • †Diplograptus peosta
• †Doleroides
  • †Doleroides pervetus
• †Dolichoharpes
  • †Dolichoharpes ottawaensis
• †Drepanoistodus
  • †Drepanoistodus suberectus
• †Drumaspis
  • †Drumaspis sabulosa
  • †Drumaspis tanycodia
• †Dvorakia
  • †Dvorakia chattertoni – type locality for species
  • †Dvorakia klapperi –

E

• †Eccyliopterus
  • †Eccyliopterus owenanus
• †Ectenaspis
  • †Ectenaspis beckeri – type locality for species
• †Ectenocrinus
  • †Ectenocrinus raymondi
  • †Ectenocrinus simplex
• †Ectomaria
  • †Ectomaria pagoda
  • †Ectomaria prisca
• †Edrioaster
  • †Edrioaster bigsbyi
• †Ellesmeria
  • †Ellesmeria scobeyi
• †Ellesmeroceras
  • †Ellesmeroceras winonicum
• †Ellipsocephaloides
  • †Ellipsocephaloides curtus
  • †Ellipsocephaloides gracilis
• †Elliptocryprites
  • †Elliptocryprites paracylindrica – type locality for species
• †Elliptocyprites
  • †Elliptocyprites paracylindrica – type locality for species

• 

  Fossilized shells and restored appearances of the Middle-Late Ordovician nautiloid cephalopod Endoceras

  †Endoceras
  • †Endoceras atkinsonense
  • †Endoceras clarkei
  • †Endoceras clermontense
  • †Endoceras decorahense
  • †Endoceras eburneolum – type locality for species
  • †Endoceras fulgar
  • †Endoceras gracillimum
  • †Endoceras kayi
  • †Endoceras proteiforme
  • †Endoceras thomasi
• †Eobelodina
  • †Eobelodina hormacola
• †Eochonetes
  • †Eochonetes recedens
• †Eomonorachus
  • †Eomonorachus intermedius
• †Eoplectodonta
  • †Eoplectodonta recedens
  • †Eoplectodonta saxea
• †Eoschmidtella
  • †Eoschmidtella umbonata
• †Eotomaria
  • †Eotomaria dryope
  • †Eotomaria vicina
• †Ephippiorthoceras
  • †Ephippiorthoceras laddi
  • †Ephippiorthoceras tenuistriatum
• †Eremotrema – tentative report
  • †Eremotrema emacerata
• †Eridotrypa
  • †Eridotrypa aedilis
  • †Eridotrypa exigua
• †Erismodus
  • †Erismodus quadridactylus
• †Eroicaspira
  • †Eroicaspira bellicincta
• †Erratencrinurus
  • †Erratencrinurus vigilans
• †Escharopora
  • †Escharopora subrecta
• †Eukloedenella
  • †Eukloedenella richmondensis
• †Eumorphocystis
• †Eunema
  • †Eunema centralis
  • †Eunema concinnula
  • †Eunema helicteres
  • †Eunema quadrisulcata
  • †Eunema simile
• †Euomphalopsis
  • †Euomphalopsis depressa – type locality for species
• †Euprimitia
  • †Euprimitia celata
  • †Euprimitia labiosa
  • †Euprimitia linepunctata
  • †Euprimitia sanctipauli
• †Eurychilina
  • †Eurychilina cannonfallsensis – type locality for species
  • †Eurychilina depressa
  • †Eurychilina incurva
  • †Eurychilina kayi – type locality for species
  • †Eurychilina micropunctata – type locality for species
  • †Eurychilina minutifoveata
  • †Eurychilina partifimbriata
  • †Eurychilina reticulata
  • †Eurychilina subradiata
  • †Eurychilina sugarcreekensis – type locality for species
  • †Eurychilina ventrosa
• †Eurycystites
  • †Eurycystites granosus
• †Eurymya
  • †Eurymya plana
• †Eurystomites
  • †Eurystomites kelloggi –

F

• †Fayettoceras – tentative report
  • †Fayettoceras beloitense
• †Fisherities

• 

  Fossil of the Middle Ordovician-Silurian trilobite Flexicalymene

  †Flexicalymene
  • †Flexicalymene senaria
• †Floripatella
  • †Floripatella humilis
• †Furcitella
  • †Furcitella scofieldi
• †Fusispira
  • †Fusispira angusta
  • †Fusispira convexa
  • †Fusispira inflata
  • †Fusispira intermedia
  • †Fusispira nobilis
  • †Fusispira planulata
  • †Fusispira spicula
  • †Fusispira subbrevis
  • †Fusispira subfusiformis
  • †Fusispira ventricosa
  • †Fusispira vittata –

G

• 

  Gabriceraurus dentatus

  †Gabriceraurus
  • †Gabriceraurus mifflinensis
• †Geisonoceras
  • †Geisonoceras clermontense
  • †Geisonoceras scofieldi
• †Globonema
  • †Globonema niota
• †Glyptocrinus
  • †Glyptocrinus ornatus – or unidentified related form
  • †Glyptocrinus pustulosis
  • †Glyptocrinus tridactylus
• †Glyptocystites
• †Glyptocystitid – type locality for genus
• †Glyptorthis
  • †Glyptorthis bellarugosa
  • †Glyptorthis insculpta
• †Gonioceras
  • †Gonioceras anceps
  • †Gonioceras homerense
  • †Gonioceras kayi
  • †Gonioceras occidentale
• †Goniophora
  • †Goniophora absimilis
• †Gorbyoceras
• †Graptodictya
  • †Graptodictya proava
  • †Graptodictya simplex
• †Grenprisa
  • †Grenprisa billingsi

• 

  Multiple views of a fossil of the Ordovician horn coral Grewingkia

  †Grewingkia
• †Gyronema
  • †Gyronema pulchellum
  • †Gyronema semicarinatum –

H

• †Hallatia
  • †Hallatia convexa
  • †Hallatia duplicata
  • †Hallatia particylindrica
• †Halliella
  • †Halliella magnipunctata

• 

  Fossil of the Ordovician bryozoan ("moss animal") Hallopora

  †Hallopora
  • †Hallopora dumalis
  • †Hallopora goodhuensis
  • †Hallopora multitabulata
  • †Hallopora undulata
• †Hebertella
  • †Hebertella occidentalis
• †Hebetoceras – tentative report
• †Helcionopsis
  • †Helcionopsis depressum
  • †Helcionopsis wisconsinensis
• †Helicotoma
  • †Helicotoma planulata
• †Helopora
  • †Helopora divaricata
• †Hemicystites
  • †Hemicystites curtus
  • †Hemicystites paulianus
• †Hemiphragma
  • †Hemiphragma irrasum
  • †Hemiphragma tenuimurale
• †Hesperidella
  • †Hesperidella initialis
• †Hesperorthis
  • †Hesperorthis tricenaria
• †Hindia
  • †Hindia sphaeroidalis
• †Hiscobeccus
  • †Hiscobeccus capax

• 

  Fossilized shells of the Ordovician-Carboniferous sea snail Holopea

  †Holopea
  • †Holopea ampla
  • †Holopea appressa
  • †Holopea concinnula
  • †Holopea excelsa
  • †Holopea insignis
  • †Holopea obliqua
  • †Holopea paludiniformis
  • †Holopea pyrene
  • †Holopea rotunda
  • †Holopea similis
  • †Holopea supraplana
• †Holtedahilina
  • †Holtedahilina emaciata
• †Homotrypa
  • †Homotrypa subramosa
• †Homotrypella
  • †Homotrypella cribrosa
  • †Homotrypella hospitalis
  • †Homotrypella instabilis
• †Horiostomella
• †Hormotoma
  • †Hormotoma artemesia
  • †Hormotoma cassina
  • †Hormotoma gracilis
  • †Hormotoma minnesotensis
  • †Hormotoma multivolvis
  • †Hormotoma neglecta
  • †Hormotoma oehlerti
  • †Hormotoma subangulata
• †Hudsonaster
  • †Hudsonaster narrawayi
  • †Hudsonaster rugosus – or unidentified related form
• †Hybocrinus
  • †Hybocrinus conicus
• †Hypseloconus – type locality for genus
  • †Hypseloconus cornutiformis – type locality for species
  • †Hypseloconus elongatus – type locality for species
• †Hypsiptycha
  • †Hypsiptycha anticostiensis –

I

• †Icriodella
  • †Icriodella superba
• †Icriodus
  • †Icriodus calvini – type locality for species
  • †Icriodus orri – type locality for species
• †Idahoia
  • †Idahoia serapia
  • †Idahoia serapio
  • †Idahoia wisconsensis
• †Idiospira
  • †Idiospira panderi
• †Illaenus
  • †Illaenus americanus
• †Ischadites
  • †Ischadites iowensis
• †Isorthoceras
  • †Isorthoceras junceum
  • †Isorthoceras sociale

• 

  Fossil of the Middle-Late Ordovician giant trilobite Isotelus.

  †Isotelus
  • †Isotelus gigas
  • †Isotelus iowensis
  • †Isotelus simplex
  • †Isotelus susae
• †Isotomocrinus
  • †Isotomocrinus minutus –

K

• †Kentlandoceras –
  • †Kentlandoceras husseyi
  • †Kentlandoceras schrocki – or unidentified comparable form
• †Kiesowia – tentative report
  • †Kiesowia verrucosa

• 

  Fossilized shells of the Middle Ordovician-Permian nautiloid cephalopod Kionoceras

  †Kionoceras
  • †Kionoceras decorahense
  • †Kionoceras postvillense
  • †Kionoceras tenuitectum
  • †Kionoceras thomasi
• †Kirengella
  • †Kirengella rectilateralis – type locality for species
  • †Kirengella stabilis – type locality for species
• †Kokenospira
  • †Kokenospira costalis – type locality for species
• †Krausella
  • †Krausella arcuata
  • †Krausella curtispina
  • †Krausella inaequalis
  • †Krausella variata –

L

• †Laccoprimitia
  • †Laccoprimitia fillmorensis
• †Laddella
  • †Laddella insueta
• †Lambeoceras
  • †Lambeoceras confertum
  • †Lambeoceras cultratum – or unidentified comparable form
• †Lecanospira
  • †Lecanospira transversocordatus – type locality for species
• †Leperditella
  • †Leperditella fryei
  • †Leperditella macra
  • †Leperditella millepunctata
  • †Leperditella persimilis
• †Lepidocyclus
  • †Lepidocyclus laddi
• †Lesueurilla
  • †Lesueurilla beloitensis
• †Lichenaria
  • †Lichenaria typa

• 

  Shell of the Cambrian-modern brachiopod Lingula

  †Lingula
  • †Lingula morsei
  • †Lingula philomela
• †Lingulasma
  • †Lingulasma galenensis
• †Lingulops
• †Liospira
  • †Liospira americana
  • †Liospira angustata
  • †Liospira decipens
  • †Liospira micula
  • †Liospira modesta
  • †Liospira obtusa
  • †Liospira progne
  • †Liospira vitruvia
• †Loganoceras
• †Lophospira
  • †Lophospira decursa
  • †Lophospira major
  • †Lophospira milleri
  • †Lophospira obliqua
  • †Lophospira perangulata – type locality for species
  • †Lophospira serrulata
  • †Lophospira spironema
  • †Lophospira ventricosa
• †Loxobucania
  • †Loxobucania emmonsi
  • †Loxobucania lindsleyi
• †Lyrodesma
  • †Lyrodesma cannonense – type locality for species
• †Lytospira
  • †Lytospira subrotunda
  • †Lytospira undulatus –

M

• †Maclurina
  • †Maclurina bigsbyi
  • †Maclurina manitobensis
• †Maclurites
  • †Maclurites crassa
  • †Maclurites cuneata
  • †Maclurites depressus
  • †Maclurites nitidus
  • †Maclurites subrotunda
• Macrocypris
  • †Macrocypris kayi
• †Macrocyproides
  • †Macrocyproides clermontensis
• †Macrocyprus
  • †Macrocyprus kayi
• †Macronotella
  • †Macronotella arcta
  • †Macronotella scofeldi
  • †Macronotella scofieldi
• †Manespira
  • †Manespira nicolleti
• †Manitoulinoceras
  • †Manitoulinoceras neleum
  • †Manitoulinoceras warsawense
  • †Manitoulinoceras wykoffense
• †Maratia
  • †Maratia mana
  • †Maratia mara
  • †Maratia micula
• †Matheria
• †Megamyonia
  • †Megamyonia unicostata
• †Merocrinus
  • †Merocrinus britonensis
• †Metaspyroceras
  • †Metaspyroceras clarkei
  • †Metaspyroceras minneapolis
  • †Metaspyroceras nicolleti
  • †Metaspyroceras perlineatum
  • †Metaspyroceras wisconsinense
• †Michelinoceras
  • †Michelinoceras beltrami
  • †Michelinoceras multicameratum
• †Microcoelodus
• †Milleratia
  • †Milleratia cincinnatiensis
• †Mitoclema
  • †Mitoclema mundulum
• †Mixoconus
  • †Mixoconus primus
• †Modiolodon
• †Modiolopsis
  • †Modiolopsis fountainensis
  • †Modiolopsis gregalis
  • †Modiolopsis nana – type locality for species
• †Monocheilus
  • †Monocheilus anatinum
  • †Monocheilus micros
• †Monocyclic
  • †Monocyclic inadunate
• †Monotrypa
• †Multioistodus
• †Myeinocystites
  • †Myeinocystites crossmani –

N

• †Nanno
  • †Nanno aulema
• †Nasutimena
  • †Nasutimena fluctuosa – or unidentified comparable form
• †Nematopora
  • †Nematopora conferta
  • †Nematopora consueta
  • †Nematopora ovalis
• †Neobothriocidaris
  • †Neobothriocidaris templetoni
• †Neocoleodus
• †Neopanderodus
• †Ningulella
  • †Ningulella paucisulcata
• †Nodambichilina
  • †Nodambichilina symmetrica
• †Nuculites –

O

• †Oepikina
  • †Oepikina inquassa
  • †Oepikina minnesotensis
• †Oistodus
  • †Oistodus abundans
  • †Oistodus venustus
• †Omospira
  • †Omospira laticincta
  • †Omospira trentonensis
• †Oneotodus
  • †Oneotodus ovatus
• †Onniella
  • †Onniella porrecta
  • †Onniella quadrata
• †Onoceras
  • †Onoceras abruptum
  • †Onoceras douglassi
  • †Onoceras tetreauvillense
• †Ophileta
• †Ophiletina
  • †Ophiletina angularis
  • †Ophiletina fausta
  • †Ophiletina sublaxa
• †Opikatia
  • †Opikatia emaciata
  • †Opikatia rotunda
• †Orbiculoidea
  • †Orbiculoidea lamellosa – or unidentified comparable form
  • †Orbiculoidea pelopea
• †Ormoceras – tentative report
  • †Ormoceras maquoketense
• †Orthoceras
  • †Orthoceras beltrami
  • †Orthoceras minnesotense
• †Orthodesma
  • †Orthodesma canaliculatum
  • †Orthodesma caniculatum
  • †Orthodesma litoralis
• †Orthograptus
• †Oulodus
  • †Oulodus serratus
• †Oxoplecia
  • †Oxoplecia ulrichi
• †Ozarkodina
  • †Ozarkodina concinna
  • †Ozarkodina delecta
  • †Ozarkodina raaschi –

P

• †Pachydictya
  • †Pachydictya elegans
• †Pachyglossella
  • †Pachyglossella elderi
  • †Pachyglossella riciniformis
• †Palaeocrinus
  • †Palaeocrinus angulatus
• †Palaeoglossa
  • †Palaeoglossa hurlburti
• †Palaeoneilo
• †Paleocrinus
  • †Paleocrinus angulatus
• †Panderodus
  • †Panderodus feulneri
  • †Panderodus gracilis
  • †Panderodus panderi
• †Parabolbina
  • †Parabolbina antecedans
  • †Parabolbina carinifera
  • †Parabolbina staufferi
• †Paraliospira
  • †Paraliospira abrupta
  • †Paraliospira supracingulata
• †Paraschmidtella
  • †Paraschmidtella irregularis
  • †Paraschmidtella uphami
• †Parastrophina
  • †Parastrophina berensis
  • †Parastrophina bernensis
  • †Parastrophina rotundiformis
• †Parenthatia
  • †Parenthatia camerata
  • †Parenthatia punctata
• †Parschmidtella
  • †Parschmidtella uphami
• †Paucicrura
  • †Paucicrura corpulenta
  • †Paucicrura rogata
• †Paupospira
  • †Paupospira burginensis
  • †Paupospira elevata
  • †Paupospira oweni
  • †Paupospira sumnerensis
• †Pedomphalella
  • †Pedomphalella intermedia
  • †Pedomphalella subovata
• †Periglyptocrinus
  • †Periglyptocrinus spinuliferus
• †Periodon
  • †Periodon grandis
• †Petrocrania
  • †Petrocrania halli
  • †Petrocrania trentonensis
• †Phialaspongia – type locality for genus
  • †Phialaspongia fossa – type locality for species
• †Phragmodus
  • †Phragmodus cognitus
  • †Phragmodus inflexus
  • †Phragmodus undatus
• †Phragmolites
  • †Phragmolites compressus
  • †Phragmolites dyeri
  • †Phragmolites fimbriata
  • †Phragmolites obliquus
  • †Phragmolites triangularis
• †Phyllodictya
  • †Phyllodictya varia
• †Pinodema
  • †Pinodema conradi
• †Pionodema
  • †Pionodema circularis
  • †Pionodema subaequata

• 

  Fossilized shell of the Ordovician brachiopod Plaesiomys

  †Plaesiomys
  • †Plaesiomys meedsi
  • †Plaesiomys proavitus
  • †Plaesiomys subquadrata
• †Platystrophia
  • †Platystrophia amoena
  • †Platystrophia biforata
  • †Platystrophia extensa – tentative report
  • †Platystrophia trentonensis
• †Plectoceras
  • †Plectoceras occidentale
  • †Plectoceras robertsoni
• †Plectodina
  • †Plectodina aculeata
  • †Plectodina tenuis
• †Plectorthis
  • †Plectorthis plicatella
• †Plethocardia
  • †Plethocardia suberecta
• †Plethospira
  • †Plethospira cannonensis – type locality for species
  • †Plethospira cassina

• 

  Fossil of the Late Ordovician cystoid echinoderm Pleurocystites

  †Pleurocystites
  • †Pleurocystites squamosus
• †Polygammoceras
  • †Polygammoceras prestonense
• †Polygnathus
  • †Polygnathus curtigladius
  • †Polygnathus intermedius
  • †Polygnathus linguiformis
  • †Polygnathus parawebbi
• †Polygrammoceras
  • †Polygrammoceras prestonense
• †Polyplacognathus
  • †Polyplacognathus ramosus
• †Porocrinus
  • †Porocrinus elegans
  • †Porocrinus fayettensis
  • †Porocrinus pentagonius
  • †Porocrinus smithi – or unidentified related form
• †Praepleurocystis
• †Prasopora
  • †Prasopora insularis
• †Primitella
  • †Primitella constricta
  • †Primitella plattevillensis
• †Primitia
  • †Primitia cannonensis – type locality for species
  • †Primitia gibbera
  • †Primitia mammata
  • †Primitia spinata
  • †Primitia tumidula
• †Primitiella
  • †Primitiella bellevuensis
  • †Primitiella carlei
  • †Primitiella constricta
  • †Primitiella milleri
  • †Primitiella plattevillensis
• †Primitiopsis – tentative report
  • †Primitiopsis bella
• †Probillingsites
  • †Probillingsites milleri
  • †Probillingsites pronis
  • †Probillingsites welleri
• †Prolobella
• †Promopalaeaster
  • †Promopalaeaster wilsoni
• †Proplina
  • †Proplina convexum – type locality for species
  • †Proplina cornutaformis – type locality for species
  • †Proplina corpulentum – type locality for species
  • †Proplina extensum – type locality for species
• †Prosaukia
  • †Prosaukia ambigua
  • †Prosaukia misa
• †Proteroconus
  • †Proteroconus capuloides – type locality for species
• †Protopanderodus
  • †Protopanderodus liripipus
• †Pseudagnostus
  • †Pseudagnostus josephus
• †Pseudolingula
  • †Pseudolingula eva
  • †Pseudolingula iowensis
• †Pseudoprimitella
  • †Pseudoprimitella unicornis
• †Pseudulrichia
  • †Pseudulrichia simplex
• †Psuedulrichia
  • †Psuedulrichia simplex
• †Pterinea
• †Pterotheca
  • †Pterotheca attenuata
• †Pterygometopus
  • †Pterygometopus sclerops – or unidentified comparable form
• †Ptiloconus
• †Ptilodictya – tentative report
• †Ptychaspis
  • †Ptychaspis granulosa
  • †Ptychaspis miniscaensis
  • †Ptychaspis striata
  • †Ptychaspis tuberosa
• †Ptychocrinus
• †Punctaparchites
  • †Punctaparchites rugosus
  • †Punctaparchites splendens
• †Pycnocrinus
  • †Pycnocrinus gerki
  • †Pycnocrinus multibrachialis
  • †Pycnocrinus sardesoni
• †Pyrgocystis
  • †Pyrgocystis sardesoni –

Q

• †Quasibollia –
  • †Quasibollia persulcata
  • †Quasibollia ridicula
• †Quienquecaudex
  • †Quienquecaudex springeri –

R

• †Rafinesquina –
  • †Rafinesquina deltoidea
  • †Rafinesquina nitans
  • †Rafinesquina trentonensis
• †Raphistoma
  • †Raphistoma shakopeense – type locality for species
• †Raphistomina
  • †Raphistomina lapicida
  • †Raphistomina rugata
• †Raymondatia
  • †Raymondatia goniglypta
• †Redpathoceras – tentative report
• †Reedsoceras
  • †Reedsoceras macrostomum
• †Reteocrinus
  • †Reteocrinus rocktonensis
  • †Reteocrinus spinosus
• †Rhaphanocrinus
  • †Rhaphanocrinus buckleyi
• †Rhaphistomina
  • †Rhaphistomina rugata
• †Rhinidictya
• †Rhynchotrema
  • †Rhynchotrema ainsliei
  • †Rhynchotrema laticosta
  • †Rhynchotrema wisconsinense
• †Rhytimya
• †Richardsonoceras
  • †Richardsonoceras beloitense
  • †Richardsonoceras clarkei
  • †Richardsonoceras romingeri
  • †Richardsonoceras scofieldi
  • †Richardsonoceras simplex
• †Rigidella
  • †Rigidella cannonensis – type locality for species
• †Rioceras
  • †Rioceras consuetum – tentative report
• †Rosticellula
  • †Rosticellula colei
• Rostricellula
  • †Rostricellula minnesotensis –

S

• †Saccelatia
  • †Saccelatia angularis
  • †Saccelatia arcuamuralis
  • †Saccelatia arrecta
  • †Saccelatia bullata
  • †Saccelatia cletifera
• †Saffordia
• †Salpingostoma
  • †Salpingostoma buelli
  • †Salpingostoma imbricata
  • †Salpingostoma sculptilis
• †Saratogia
  • †Saratogia hamula
• †Scaevogyra
  • †Scaevogyra swezeyi – type locality for species
• †Scalenocystites
  • †Scalenocystites strimplei
• †Scalites
  • †Scalites peracutum

• 

  Fossils of the Cambrian mollusc Scenella

  †Scenella
  • †Scenella compressa
  • †Scenella obtusa
• †Sceptaspis
  • †Sceptaspis lincolnensis
• †Schizambon
• †Schizocrania
  • †Schizocrania filosa
• †Schmidtella
  • †Schmidtella affinis
  • †Schmidtella brevis
  • †Schmidtella lacunosa
• †Schuchertia
• †Schuchertoceras
  • †Schuchertoceras thomasi
• †Scofieldia
  • †Scofieldia bilateralis
• †Scofieldoceras
  • †Scofieldoceras depressum
  • †Scofieldoceras shumardi
• †Scyphiodus
  • †Scyphiodus primus
• †Similodonta
• †Simulites
  • †Simulites concinnus
• †Sinuites
  • †Sinuites cancellatus
  • †Sinuites pervoluta
  • †Sinuites rectangularis
  • †Sinuites subcompressa – type locality for species
• †Sivertsia
• †Skenidioides
  • †Skenidioides anthonense
• †Sowerbyella
  • †Sowerbyella curdsvillensis
  • †Sowerbyella minnesotensis
• †Spatiopora
  • †Spatiopora lineata
• †Sphenolium
• †Sphenosphaera
  • †Sphenosphaera platystoma
  • †Sphenosphaera rogersensis
• †Spyroceras
  • †Spyroceras cylindratum
  • †Spyroceras lesueuri
  • †Spyroceras perroti – or unidentified comparable form
  • †Spyroceras scofieldi
• †Staufferella
  • †Staufferella falcata
• †Staufferoceras
  • †Staufferoceras featherstonhaughi
• †Stereoconus
  • †Stereoconus gracilis
• †Stictopora
  • †Stictopora dumosa
  • †Stictopora exigua
  • †Stictopora lita
  • †Stictopora minima
  • †Stictopora mutabilis
  • †Stictopora neglecta – or unidentified comparable form
  • †Stictopora paupera
• †Stictoporella
  • †Stictoporella angularis
  • †Stictoporella cribrosa
  • †Stictoporella frondifera
  • †Stictoporella gracilis
• †Stigmacephalus
  • †Stigmacephalus flexifrons
• †Stigmaspis
  • †Stigmaspis hudsonensis
• †Stigmatella
  • †Stigmatella claviformis
• †Strepsodiscus
  • †Strepsodiscus franconiensis – type locality for species
  • †Strepsodiscus strongi
• †Streptelasma
  • †Streptelasma corniculum

• 

  Fossilized shell of the Ordovician-Silurian brachiopod Strophomena

  †Strophomena
  • †Strophomena billingsi
  • †Strophomena filitexta
  • †Strophomena incurvata
  • †Strophomena occidentalis
  • †Strophomena planodorsata
  • †Strophomena plattinensis – or unidentified comparable form
  • †Strophomena septata
  • †Strophomena trilobata
  • †Strophomena trilobita
• †Stylocyrtoceras
  • †Stylocyrtoceras tantillum – type locality for species
• †Subulites
  • †Subulites conradi
  • †Subulites dixonenesis
  • †Subulites elongatus
  • †Subulites pergracilis
  • †Subulites regularis
• †Sygcaulocrinus
  • †Sygcaulocrinus typus –

T

• †Tanaocystis
• †Tancrediopsis
• †Technophorus
  • †Technophorus divaricatus
• †Teichertoceras
  • †Teichertoceras husseyi – or unidentified comparable form
• †Tetradella
  • †Tetradella ellipsilira
  • †Tetradella subquadrans
  • †Tetradella ulrichi
• †Tetranota
  • †Tetranota bidorsata
  • †Tetranota macra
  • †Tetranota obsoleta
  • †Tetranota sexcarinata
  • †Tetranota wisconsinensis
• †Tetraprioniodus
  • †Tetraprioniodus breviconus
• †Thaleops
  • †Thaleops ovata
• †Thomasatia
  • †Thomasatia falcicosta
• †Thuroholia
  • †Thuroholia cribriformis
  • †Thuroholia croneisi
• †Traskocrinus
  • †Traskocrinus mahlburgi
• †Trematis
  • †Trematis huronensis
• †Trematopora
  • †Trematopora primigenia
• †Trichinocrinus – or unidentified related form
• †Triconodella
  • †Triconodella flexa
• †Trigrammaria
  • †Trigrammaria winchelli
• †Tripteroceras
  • †Tripteroceras oweni
  • †Tripteroceras planoconvexum
  • †Tripteroceras scofieldi
• †Trochonema
  • †Trochonema altum
  • †Trochonema beachi
  • †Trochonema beloitense
  • †Trochonema fragile
  • †Trochonema retrorsum
  • †Trochonema rugosa
  • †Trochonema subcrassum
  • †Trochonema umbilicata
  • †Trochonema vagrans

• 

  Illustration of a fossilized shell in multiple views of the Silurian monoplacophoran mollusc Tryblidium reticulatum. Head region is to the left.

  †Tryblidium
  • †Tryblidium exserta –

U

• †Ulrichaster –
  • †Ulrichaster ulrichi
• †Ulrichia
  • †Ulrichia saccula
• †Ulrichoceras
  • †Ulrichoceras beloitense

• 

  Fossil of the Ordovician-Devonian sea star Urasterella

  †Urasterella
• †Valcouroceras
• †Vanuxemia
  • †Vanuxemia dixonensis
• †Vellamo
  • †Vellamo americana –

W

• †Westonoceras
  • †Westonoceras iowense
  • †Westonoceras minnesotense
• †Whiteavesia
• †Whiteavesites
• †Whitfieldoceras
  • †Whitfieldoceras clarkei
  • †Whitfieldoceras exiguum – or unidentified comparable form
  • †Whitfieldoceras minimum
  • †Whitfieldoceras mumiaforme
• †Wilbernia
  • †Wilbernia pero
• †Willmanocystis
  • †Willmanocystis denticulatus
• †Winchellatia
  • †Winchellatia ceratopea – type locality for species
  • †Winchellatia lansingensis
  • †Winchellatia longispina
  • †Winchellatia minnesotensis
  • †Winchellatia minnsotensis –

Z

• †Zittelloceras
  • †Zittelloceras beloitense
  • †Zittelloceras brevicurvatum
  • †Zittelloceras clarkeanum
  • †Zittelloceras percurvatum
  • †Zittelloceras scofieldi
  • †Zittelloceras tenuistriatum
• †Zygobolboides
  • †Zygobolboides calvini
  • †Zygobolboides grafensis
  • †Zygobolboides iowensis
  • †Zygobolboides thomasi
• †Zygospira
  • †Zygospira lebanonensis
  • †Zygospira modesta
  • †Zygospira plinthii – type locality for species
  • †Zygospira uphami

References

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.